Is Philip living with Melissa again in Series 5?

I've just finished re-watching Series 5.

In the second half of Series 4, Rachel was looking after Philip. But in Series 5, although Philip is still in it, there's never any indication he's still living with Rachel (and Rachel seems to have moved into a smaller place than she did in Series 4 anyway).

When Max comes over to Rachel's house to threaten her, there is no sign that Philip's there. When Philip goes out with Ros it's mentioned that they often get together at his home - yet Ros doesn't seem to know Rachel any better than a regular student would. There's no mention at all in the Ros/Jo episode of Rachel ever having had Ros at her house, which you'd think there would be in the circumstances. Philip's in Rachel's house in the final episode helping her with the wedding - but I get the impression he's just come to help, not that he lives there. When Rachel tells Adam she's leaving and that they can just 'go on their honeymoon and not come back', no one questions what the deal is with Philip.

I wondered if we're meant to get the idea that he's moved back in with his mum and his half-sibling she was having with Eddie?